That sounds similar to what a recent V' put down. That sounds a little more than 580

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Yeah, only 12-13% loss, instead of the typical 15%...might be more like 600 at the crank, or just less loss through the drivetrain. Maybe the auto's will put down 480-490RWHP....

12-13% is what regular M6 SS have for drive train loss since they dyno about high 360s low 370s. I think 580 hp is pretty accurate.
The autos are usually about 40 rwhp lower, so I'm guesstimating they an auto ZL1 would dyno about 460 ish.

12-13% is what regular M6 SS have for drive train loss since they dyno about high 360s low 370s. I think 580 hp is pretty accurate.
The autos are usually about 40 rwhp lower, so I'm guesstimating they an auto ZL1 would dyno about 460 ish.

But isn't that using the factor from a L99 auto comparison vs a LS3 m6 instead of an auto CTS-V vs m6 CTS-V or did I misunderstand.

12-13% is what regular M6 SS have for drive train loss since they dyno about high 360s low 370s. I think 580 hp is pretty accurate.
The autos are usually about 40 rwhp lower, so I'm guesstimating they an auto ZL1 would dyno about 460 ish.

There won't be 40 rwhp difference on the ZL1 (More like 20)

The LSA flywheel hp is the same 580 for Auto or Manual where as the L99 is 26hp less than the LS3 right off the bat.